The State of the Art in the Technical Performance of Lung-Sparing Operations for Malignant Pleural Mesothelioma

Abstract

Malignant pleural mesothelioma remains an incurable disease for which the role of surgery remains controversial. Though not yet clearly defined there does appear to be a subset of patients who benefit from a surgery-based multimodal treatment plan, beyond what would be expected with current nonoperative therapies. As with other pleural cancers it is probably not possible to achieve a microscopic complete resection with any operation. The goal of surgery in this setting, therefore, is to remove all visible and palpable disease - a macroscopic complete resection. There are basically two surgical approaches to achieve a macroscopic complete resection, lung-sacrificing and lung-sparing. Lung-sacrificing surgery, which likely leaves behind the least amount of microscopic disease, is accomplished as an extrapleural pneumonectomy. This is a well established and standardized operation. Lung-sparing surgery for malignant pleural mesothelioma, on the other hand, does not currently enjoy any degree of consistency. Not only are the reported variations on the operation widely disparate, but even the nomenclature to describe the operation is highly variable. Often the selection of a lung-sparing approach is reported as an intraoperative decision that hinges on the bulk of the cancer and/or the degree of extension into the pulmonary fissures. This article describes the current evolution of a lung-sparing procedure, radical pleurectomy, which has been used to achieve a macroscopic complete resection in over a hundred patients. Many of these cases involved bulky cancers, some exceeding two liters in volume, and often with extensive invasion of the pulmonary fissures. With the described technique there has not yet been an instance where conversion to extrapleural pneumonectomy would have contributed to the ability to achieve a macroscopic complete resection. Whether or not radical pleurectomy is the optimal approach for any or all patients undergoing surgery-based multimodal treatment for malignant pleural mesothelioma is not known, but the described technique does offer an operation that can serve as a consistent foundation for any surgery-based treatment strategy where achieving a macroscopic complete resection, while sparing the lung, is desired.